congressman steve king had a hearing today in the house. >> we have about what, 6.3 billion people on the planet. so that would be a universe that you addressed, i think. but do you believe that there should be a limit to the number of people brought into the united states? >> i do think that the answer is to increase the number of high-skilled immigrants that we have. but also to put the folks who are already here -- >> but mayor castro, what i'm hearing here is that you wouldn't put a limit on any of those groups, you would just fill up the categories essentially by demand. and that demand is potentially the entire population of the planet. >> what do you say to someone who worries about the entire planet coming to the 50 states, as a result of immigration reform? >> i think if he is worried about the entire planet he should support climate change efforts. but that said, this is really about -- this shows today's judiciary hearing in the house shows how out of touch some of our elected officials are in the house, and unfortunately, i think in the senate, as well. and really, the ele